陕西药用植物寄生真菌的研究

本文报导了从陕西省中药材产区调查采集、分离培养、鉴定整理出的34属80种寄生真菌,大多为陕西省首次报道,它们分别寄生在25科59种的药用植物体上。     

陕西秦巴山区野生食用菌的研究

陕西秦巴山区野生食用菌１０５种，计子囊菌亚门７种，担子菌亚门９８种，接学名字母顺序排列。每种列有中名、拉丁学名、生境和利用状况，并提出推广栽培竹荪、驯化试种松口蘑、羊肚菌和用磁化水探索工业化生产香菇新途径等建设性开发意见。     

陕西农业综合发展中的干旱基本规律研究

分析了干旱给陕西农业发展带来的威胁和损失，总结了干旱的基本规律和干旱形成的主要原因，进而提出了相应的对策。     

陕西黄河滩地农田鼠类调查

报道了1988年6—11月、1991年3—5月对陕西东部黄河滩地农田害鼠的种类、数量及分布调查的结果。计有鼠类9种,隶属3科。其中子午沙鼠、小家鼠、大仓鼠和黑线姬鼠为本地区的优势种。     

陕西省农业土地适宜性评价研究

1 基本理论土地资源的适宜性,是在一定的社会、经济条件下,土地资源的内在自然经济属性对发展农业生产所提供的生态环境的适宜程度,适宜程度的大小以具体作物的生态条件特征来衡量,而与某种农作物生长适应之间的关系协调与否,既是表明土地资源对某种利用目的的适宜程度水平,又     

Early Cambrian phosphatized blastula- and gastrula-stage animal fossils from southern Shaanxi

Marine invertebrate animal embryos and their early developmental products are of great significance to the study of taxonomy and phylogeny of early animals. A great number of phosphatized globular fossils were collected fromthe early Cambrian Kuanchuanpu Member (upper Dengying Formation), southern Shaanxi, and a nearly complete develo-pmental sequence—from a fertilized egg, via blastodisc formation, blastula development, blastodisc enlargement toward gastrulae, to tissue differentiation—can be discerned in this collection. This discovery provides unmatchable material for studies on the origin, taxonomy, radiation, and ontogeny of early metazoans.     

Pollen-recorded climate changes between 13.0 and 7.0 ^14C ka BP in southern Ningxia, China

A pollen record from Haiyuan section in the southern part of Ningxia revealed a detailed history of vegetation variation and associated climate changes during the period from~13.0 to~7.0 14 C ka BP.A steppe landscape under a moderately dry(and probably cool)condition(~12.7-~12.1 14 C ka BP)was replaced by a coniferous forest dominating the landscape under a generally wet climate from~12.1 to ~11.01 4C ka BP.This generally wet period,corresponding to the European B?lling/All?rod period,can be divided into three stages:a cool and wet stage between~12.1 and~11.4 14 C ka BP,a mild and rela- tively dry stage between~11.4 and~11.2 14 C ka BP,and a mild and wet stage between~11.2 and~11.0 14 C ka BP.The coniferous forest-dominated landscape was then deteriorated into steppe landscape (~11.0-~10.6 14 C ka BP)and further into a desert steppe landscape from~10.6 to~9.8 14 C ka BP,being correspondent to the European Younger Dryas period.After a brief episode of a cool and wet climate (~9.8-~9.6 14 C ka BP),a relatively mild and dry condition prevailed during the early Holocene(~9.6- ~7.6 14 C ka BP)and then a warm and humid climate started the mid-Holocene(~7.6-~7.2 14 C ka BP).     

陕西省企业信息资源集成机制的分析

介绍了企业信息资源集成机制的定义和要素,分析了陕西省企业信息资源存在的问题,结合集成管理理论,提出了企业信息资源的集成机制。     

陕西秦岭地区兽类多样性分析

陕西秦岭山地是东洋界和古北界的交汇地带,物种多样性较为丰富.有兽类7目28科82属125种,占陕西省兽类总种数的85.0%.兽类区系组成十分复杂:北方分布型有57种,南方分布型有68种,特有种23种.列入国家重点保护名录、中国物种红色名录和CITES附录的物种有54种,占该区总种数的43.2%.这些珍稀、特有动物主要分布在秦岭地区15个自然保护区内.导致众多物种濒危的原因,主要是栖息地变化和人猎杀等.